<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org" xmlns:layout="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>$Title$</title>
</head>
<body>
    <header th:fragment="header">
        this is header!
    </header>
</body>
</html>